Taking nifedipine extended-release tablets blood pressure does not come down need to consider a variety of factors, for secondary hypertension, often through antihypertensive drugs to lower blood pressure effect is not obvious, need to clarify the cause of secondary hypertension. If it is renal hypertension, treatment such as dialysis needs to be given if necessary. In the case of renal vascular hypertension, renal vascular revascularization therapy is required if necessary. In endocrine hypertension, such as primary aldosteronism, aldosterone receptor antagonists, such as spironolactone, need to be administered. In the case of pheochromocytoma, the application of alpha-blockers is required. In addition, for taking nifedipine extended-release tablets blood pressure can not be lowered, you can combine other antihypertensive drugs with different mechanisms for treatment and pay attention to therapeutic lifestyle related improvements.